2014 W + 2015 W American Eagle Silver Proof Coins ES1 + ES6. 2014 w+ 2015 W American Eagle One Ounce Silver Proof Coin with Box & Certificate of Authenticity (COA), ES1 + ES6. Collector’s version of the iconic American Eagle Silver Bullion Coin featuring Walking Liberty. The American Eagle One Ounce Silver Proof Coin is more than a silver dollar; it’s a piece of American history sure to be treasured by coin collectors. Each coin contains one ounce of. The American Eagle One Ounce Silver Proof Coin is a collector version of the official United States Mint American Eagle Silver Bullion Coin. United States Mint proof coins are extraordinarily brilliant, with sharp relief and a mirror-like background. Their frosted, sculpted foregrounds give them a special cameo effect. Proof blanks are specially treated, polished and cleaned to ensure high-quality strikes. Each coin also bears the “W” mint mark reflecting its striking at the United States Mint facility at West Point. Each coin is packaged in a blue velvet, satin-lined presentation case and accompanied by a Certificate of Authenticity. Coin Artists: Obverse- Adolph A. Reverse- John Mercanti, Sculptor-Engraver, United States Mint. Composition: 99.9% Silver. Diameter: 1.598 inches (40.60 mm). Weight: 1.0000 troy oz. Thickness: 0.120 inch (3.05 mm). 1x 2014 W American Eagle One Ounce Silver Proof Coin. 1x 2015 W American Eagle One Ounce Silver Proof Coin. 2x Certificate of Authenticity (COA).